Incorrect rear brake abs modulator valve/fmvss 121
Defect Summary
Paccar incorporated (paccar) is recalling certain 2016-2021 kenworth t680 trucks equipped with a 2.1m cab and wabco 6s/6m abs brake system with drum brakes. the brake systems were manufactured with a standard rear-brake abs modulator valve instead of a quick release valve, which may exceed the intended service-brake release timing. as such, these vehicles fail to comply with the requirements of federal motor vehicle safety standard number 121, "air brake systems."
Safety Consequence
Longer than expected service-brake release timing may lengthen vehicle stopping distance, increasing the risk of a crash.
Corrective Action
Paccar will notify owners, and dealers will replace the standard rear-brake, abs modulator valve with a quick release valve, free of charge. the recall began november 30, 2020. owners may contact paccar customer service at 1-425-828-5888. paccar's number for this recall is 20kwd.
Similar Recalls
Other recalls from Paccar Incorporated or involving Service Brakes, Air.
FAQ: Recall 20V593000
Your rights, the repair process, and what each field on this page means.
What is recall 20V593000?
NHTSA recall 20V593000 was issued by Paccar Incorporated on September 28, 2020. It addresses: Incorrect rear brake abs modulator valve/fmvss 121. The recall affects approximately 1,416 vehicles, with the defect involving the Service Brakes, Air component.
How do I get this recall repaired?
Contact any authorized Paccar Incorporated dealer and reference NHTSA recall ID 20V593000 or the manufacturer campaign number 20KWD. Under federal law, the repair is completely free regardless of vehicle age or owner history.
Is my vehicle included in this recall?
The only way to confirm is to look up your 17-character VIN at nhtsa.gov/recalls. NHTSA's tool will tell you if VIN-by-VIN this exact recall applies.
How long do I have to get a recall repair done?
There is no expiration on most federal safety recalls. Even if your vehicle is years old and you bought it used, the manufacturer is required to perform the repair at no cost.
Where does the data on this page come from?
All information on this page is sourced directly from the U.S. Department of Transportation public dataset for NHTSA recalls. Last refreshed: 2026-05-22. For the most current official notice, visit nhtsa.gov/recalls.